Alternating or varying pressureactuated pump



Jan. 3, 1939. L. NIKA. JR.. ET! AL 2,142,329

ALTERNATING OR VARYING PRESSURE ACTUATED PUMP Filed Dec. 16, 1937 INVENTQRS T- 5 3 Zouzjs JVl/(d, Jr: 1 BY 10m: MKa, $n

ATTORNEY Patented 1m 3, 1939 UNITED "STATES PATENT- OFFICE- ALTERNATINGOR VARYING PRESSURE- ACTUATED PUMP Louis Nika, Jr., and Louis Nika, Sr., Bronx, ,N. Y.,

assignors, by direct and mesne assignments, of thirty-seven and one-half per cent to said Louis Nika, Jr. and sixty-two and one-half per cent to said Louis Nika, Sr.

Application December 16, 1937, Serial No. 180,100

10 Claims. (01. 103-4) compressor cylinder, or air pump or liquid pump cylinders.

More specifically, the invention contemplates an arrangement or parts in such a manner that the pressure moves a piston or pistons in one direction, and during that movement that pressure is applied to the liquid, by a liquid pump,

suction action is applied to the air indirectly by building tension in a spring or springs, and said springs act to return the piston to the neutral position. It is proposed thatduring the return motion suction be applied to the liquid and pres sure'be applied to the. air, by an air pump, and then the operation repeated.

The invention has foran object the construction of a device as mentioned which is characterized by an aircylinder having an air inlet and outlet, each controlled by one way valves, a

piston for the cylinder, and means for oscillating the piston to pump air from the inlet to the outlet.

The invention contemplates associating a stem slidahly longitudinally onsaid piston and to pro,- vide said stem with a head engaging'in a hollow in the piston and arranged so that the piston moves the stem in one direction only.

Further, the invention contemplates the provision of resilient'means for urging the stem in the. other direction and a'fiuid pump controlled in a specific manner by said stem.

The invention contemplates an arrangement by which the air pump may be continuously actuated from an alternating or varying vacuum or pressure supply such as is present on an engine, and

.it is proposed to associate a liquid pump with theair pump in'a manner so that there is a constant liquid and air pressure. For further comprehension of 'the invention,

and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended In the accompanying drawing forming a material part of this disclosure:'

Fig. 1 is a vertical sectional view of a device constructed according to this invention;

Fig. 2 is a horizontal sectional view taken on the line 2'2 of Fig. 1.

Fig, 3 is a horizontal sectional view taken on the line 33 of Fig. 1.

Fig. 4 is a fragmentary vertical sectional view taken on the line l-lfoi Fig. '1.

Fig. 5 is a fragmentary view similar to a portion of Fig. 1, but illustrating a modification of the invention.

Fig. 6 is a similar view to Fig. 5, illustrating a still further modified form of the .invention.

The alternating air actuated liquid and air pump, according to this invention, comprises an air cylinder l0 having an air inlet ii and an air outlet i2. A one way valve i3 controls the inlet ii. A one way valve it controls the outlet it. A piston i3 is slidably mounted within the cylinder i0. p A means is provided for oscillating the piston 83 to pump air from the inlet to the outlet. This means includes an auxiliary piston i3 connected with the piston l3 and arranged on one side thereof and operating in an auxiliary cylinder l5. This auxiliarycylinder has an inlet i6 for alternating pressure as may be obtained from an internal combustion engine. 3c

The piston I3 is resiliently supported in a manner so as to float in a neutral position, From this position it may be moved in one direction and then in the other. The means for floating the piston i3 includes a disc I! which is stationarily mounted spaced fromthe piston I3. This disc has a projecting flange l'l. An expansion spring I8 is interposed between the piston l3 and one side of the flange I'l .Another spring I! is interposed between the other side of the flange l1 and a collar 20. This collar 20 is mounted on a bushing 2| which is fixedly mounted upon the piston i3. 1

A stem 22 is 'slidably supported longitudinally on the piston l3 and has a head 22! engaging within a hollow 23 in the piston IS. The parts are so arranged that the piston i3 when moving in one direction may move the stem 22 along with ity in this direction, but when moving in the other direction it does not aflect the position of the stem 22.

A means is provided. for urging the stem 22 in the direction'opposite to that in which the stem 22 is. moved by the piston i3'.- This means includes a cup-shaped member 2| threadedly en- 5 gaged the stem 22 and held in a fixed position ,thereorfb'y an adjustable nut 26 for adjusting the fluid pressure. An expansion spring 21' acts between the cup-shaped member and the disc II for urging the stem 22 as specified. Specifically, the stem 22 is urged upwards as viewed in Fig. 1. When the piston l3 moves downwards the bot tom end of the bushing 2| will strike the head 22 and so move the stem downwards. When the piston l3 moves upwards the hollow 23 will provide a place for the head 22 to remain in without being moved bythe piston.

The stem 22 is supported on a diaphragm 21 and is held fixedly thereon by nuts 28. The diaphragm 21 closes one end of a fluid chamber This fluid chamber has an inlet 33 and a fluid outlet 3|. A one way valve 32 controls the inlet 30. A one way valve 33 controls the outlet 3|. The stem 22 is connected with the diaphragm-21 in a manner so that when the piston i3 moves the stem downwards, fluid is drawn into the fluid chamber 29. Thereafter, the resilient means 21' exerts a pressure on this fluid to force it out from the fluid outlet 3|.

The air cylinder I0 comprises a short length of tubing ill arranged within an outer tube Ni The disc l'l rests upon one end of the tube Hi.

i An auxiliary tube ifl is also disposed within the of the disc ll.

outer tube- HI and rests against the other race which support the disc H. The auxiliary cylinder I5 is formed in a cap l5 which is threadedly engaged on the bottom end of the outer tube in.

This cap i5 has a shoulder portion li which forms a perch for the tube ID to firmly hold the tube in position. The fluid chamber 29 is formed by a top .cap 29. This top cap also has a shoulder 29 which forms an abutment for the edge portion of the diaphragm 21, and for a diaphragm holding ring 32 which is clamped and held in position by the edge portion of the cylinder. F.

The one way valve I4 includes a valve seat I! against which a valve ball M is urged by a spring l4. A bushing W is threadedly engaged in an opening in the cap I5 and has a central opening for the passage of air and serves as a support for the spring I. The valve l3 has a valve seat l3. A ball i3 is adapted to. engage the valve seat to close the valve. A spring i3 acts against a portion of the cap I5 and the valve ball Ill to urge-the valve closed. A bushing I3 is threadedly engaged in an opening in the cap I! and is formed with a central passage through which the air may pass. The valve seat 13* is formed upon the inner end of the bushing I3 The valve 13 actsto permit air to be drawn into the air cylinder i0 when the piston l3 moves upwards and acts to prevent this air from being forced out iromthe air cylinder when the pis-' ton l3 moves downwards. The valve it acts to open and allow the air from within.the air cylinder l 0 to move outwards when the piston moves downwards, and this valve closes when the. piston 13' moves upwards so that it is possible to draw in air through the open valve i3. The auxiliary piston i3" is provided with several piston rings 33. The piston l3 also has piston rings 31.

The disk II has an annular recess i'l which forms a seat for the bottom end of the spring 21'. The collar- 23 is held upon-the end of the bushing 2| by a locking element 33. The inlet valve 32 has a valve seat 32' upon which a valve head 32 is adapted to engage. A spring 32 acts against the valve head to urge it upon its valve 32 will open to permit this.

It is these tubes l0 and II seat. A bushing 32 threadedly engages in the cap 23 and is formed with a passage constituting the liquid inlet 30. The valve seat 32 is arranged upon the inner end of the bushing 32. The valve 33 engages against a valve 31 and includes a seat 33", a valve head 33'' engageable upon the seat, a spring 33 urging the valve closed, and a bushing 33 formed with a passage 3| for the liquid and forming an abutment tor the "spring 33 to act against.

When the stem 22 is moved downward liquid will be drawn in through the inlet 33 since the Simultaneously, the valve 33 will close so that the fluid enters the fluid chamber 29. When the stem 22 completes its downstroke the spring 21' will supply an upward pressure to the stem 22 which in turn presses the diaphragm 21 against the liquid in the fluid chamber 23. The liquid under pressure will cause the Jvalve 32 to close and cause the valve 33 to open and so the pressure of the liquid will be extended through the outlet 3|. This is particularly desirable for supplying the fuel to a carburetor since there will be a constant feed of the fuel.

In Fig. 5 a modification of the invention has been disclosed which distinguishes from the prior form inthe fact that there is an arrangement for adjusting the constant pressure or the liquid. This adjustment includes an annular member 40 which is threadedly engaged in an annular recess formed in the disc II. This annular member 40 has a spring seat l'l for the lower end of the spring 21. .The annular member 40' has.

several handles li'by which it may readily be gripped and turned. The arrangement is such that the annular member III may be screwed in or out to adjust the normal pressure of the spring 21. This indirectly aflectsthe pressure of the liquid. V

In Fig. 6, another modification oi the invention has been disclosed. In this arrangement the inner ends of springs l8 and I8 engage the collar 20' of bushing 2| and the outer ends of springs l8 and I 9 engage discs I1" and H, respectively, to keep the piston i3 in its normal position. The spring 21" in this form of the invention engages disc IT at one end and a cup-shaped member 25"at the other end. The discs [1" and il are spaced by tubes Hi II" and Wot diflerent lengths. These spacers may be interchanged to change the action of springs l3, l9 and 21".

In other respects this form of the invention is similar to the form previously illustrated and the same parts may be recognized by corresponding reference numerals.

While we have illustrated and described the preferred embodiments of our invention, it isto be understood that we do not limit ourselves to the precise constructions herein disclosed and the right is reserved-to all changes and modifications coming within the scope of the invention. as defined in the appended claims.

Having thus described our invention, what we claim .as new, and desireto secure by United States Letters Patent is:-'

1. In an alternating or varying pressure or vacuum actuated pump, an air pump, an air cylinder having an air inlet and an air outlet, one way valves controlling said inlet and outlet, a piston in said cylinder, means for oscillating said piston to pump'air from the inlet to theoutlet, a stem slidably supported longitudinally on said piston and having a head engaging in a hollow inthepisionarrangedsothatthepistonmwes 10 I 2,14aa29 the stem in one direction only, resilient means urgingthe stem in the other direction, a fluid chamber having a fluid inlet and a fluid outlet,

one way valves controlling said fluid inlet and fluid outlet, a diaphragm in said fluid chamber, and said stem being connected with said diaphragm, so that when the piston moves the stem, fluid is drawn into the fluid chamber and then the resilient means exerts a'pressure on the fluid to force it out of the fluid outlet.

2. In an altemating or varying pressure or vacuum actuated pump, an air pump, an air cylinder having an air inlet and an air outlet, one 1 way valves controlling said inlet and outlet, a piston in said cylinder, means for oscillating said piston to pump air from the inlet to the outlet, a stem slidably supported longitudinally on said piston and having a head engaging in a hollow in the piston arranged so that the piston moves the stem in one direction only, resilient means urging the stem in the other direction, a fluid chamber having a fluid inlet and a fluid outlet, one way valves controlling said fluid inlet and fluid outlet, a diaphragm in said fluid chamber, and said stem being connected with said diaphragm, so that when the piston moves the stem, fluid is drawn into the fluid chamber and then the resilient means exerts a pressure on the fluid to force it out ofthe fluid outlet, said means for oscillating the piston comprising an auxiliary pis-, ton connected with said piston and working in an auxiliarycylinder provided with an inlet for a fluctuating pressure or vacuum.

said piston and having a head engaging in a hollow in the piston arranged so that the piston moves the stem in one direction only, resilient means urging the stem in the other direction, a fluid chamber having a fluid inlet and a fluid outlet, one way valves controlling said fluid inlet and fluid outlet, a diaphragm in said fluid chamber, and said stem being connected with said diaphragm, so that when the piston moves the stem,- fluid is drawn into the fluid chamberand then theresilient means exerts a pressure on the fluid to force it out of the fluid outlet, abushing being mounted upon said piston, and the head of said stem engaging the bottom of the bushing when the piston moves downwards.

4. In an alternating or varying pressureor vacuum actuated pump, an air pump, an air cylinder having anair. inlet and outlet, one way valves controlling ;said inlet and outlet, a, piston in said cylinder, for oscillating said piston to pump air irom-tli' inlet to the outlet, a stem slidably supported longitudinally on said piston and having a head engaging in a hofiow in the" piston arranged so that the piston moves the stem in one direction only, resilient means urging the stemin the other direction, a fluid chamber having a fluid inlet and a fluid outlet, one

way valves controlling said fluid inlet and fluid outlet, a diaphragm in said fluid chamber, and said stem being connected with said diaphragm so a cup-shaped member fixedly mounted on the stem, a disc iixedly mounted on a portion of said cylinder and a spring engag said cup-shaped member and said disc.

5. In an alternating or varying pressure or vacuum actuated pump, an air pump, an air cylinder having an air'inlet and an air outlet, one

chamber-having a fluid inlet and a fluid outlet,

one way valves controlling said fluid inlet and fluid outlet, a diaphragm in said 'fluid chamber, and said stem being connected with said diaphragm so that when the piston moves the stem fluid is drawn into the fluid chamber and then the resilient means exerts a pressure on the fluid to force it out of the fluid outlet, said air cylinder comprising a tube mounted within an outer tube, said fluid chamber comprising another tube mounted within the outer tube, and cap members mounted on the outer ends of the outer tube for forming the head ends of said cylinders.

6. In an alternating or varying pressure or vacuum actuated pump, an air pump, an air cylinder having an air inlet and an air outlet, one way valves controlling said inlet and outlet,

a piston in said cylinder, means for oscillating said piston to pump air from the inlet to the out: let,'a stem slidably supported longitudinally on said piston and having a head'engaging in a hollow in the piston arranged so that the piston moves the stem in one direction only, resilient means urging the stem in the other direction, a

fluid chamber having a fluid inlet and a fluid out-- let, one way valves controlling said fluid inletand fluid outlet, a diaphragm in said fluid chamber,

and said stem being connected with said diaphragm so that when the piston moves the stem, fluid is drawn into the fluid chamber and then the resilient means exerts a pressure on the fluid to force it out oi. the fluid outlet, said air cylinder comprising a tube mounted within an outer tube,

'said fluid chamber comprising another tube mounted within the outer tube, and cap members mounted on the outer ends of the outer tube for forming the head ends of said cylinders, a

disc being clamped in between the inner ends of said inner tubes, and resilient means acting against said disc and directly and indirectly against said piston for floating the piston.

- 'I. In an alternating, or varying pressure or vlluum actuated pump, an air pump, an air cylinderhaving an air inlet and an air outlet, one way valves controlling said inlet and outlet,

a piston in said cyl'inder,-means for oscillating said piston to pump air from the inlet" to the outlet, a stem slidably supported longitudinallyon said piston and having a head engaging in a hollow in the piston arranged so thatthe piston moves the stem in one direction only, resilient means urging. the stem in the other direction, a

fluid chamber having a' fluid inlet and a fluid outlet, one way valves controlling said fluid inlet disc and directly and indirectly against said piston for floating the piston, said resilient means for urging the stem comprising a member flxedly mounted on the stem, and an expansion spring acting between said disc and said member.

,8. In an alternating or varying pressure" orvacuum actuated pump, an air pump, an air cylinder having-an air inlet .and an air outlet, one way valves controlling said inlet and outlet,

a piston in said cylinder, means for oscillating said piston to pump air from the inlet to the outlet,a' stem slidably supported longitudinally iii on said piston and having a head engaging in a hollow in the piston arranged so that the piston moves the stemin one direction'only, resilient means urging the stem in. the other direction, a fluid chamber having a fluid inlet and a fluid outlet, one way valves controlling said fluid inlet and fluid outlet, a diaphragm in said fluid chamber, and said stem being connected with said diaphragm so that when the piston moves the stem, fluid is drawn into the fluid chamber and then the resilient means exerts a pressure-on the fluid to force it out of the fluid outlet, said air cylinder comprising a tube mounted within an outer tube, said fluid chamber comprising another tube mounted withinthe outer'tube, and cap members mounted on the outer ends of the outer tube for forming the head ends of said cylinder, a disc being clamped in between the inner ends of said, inner tubes, resilient means acting against said disc and directly-and indirectly against said piston for floating the piston, said resilient means for urging the stem comprising a member flxedly mounted on the stem, and an expansion spring acting between said disc and said member, and an annular member mounted upon said disc and adapted to be adjusted relative thereto and abutting said spring to control its resiliency.

9. In an alternating or varying pressure or vacuum actuated pump, an air pump, an air cylinder having an air inlet and an air outlet, one way valves controlling said inlet and outlet, a piston in' said cylinder, means-for oscillating said piston to pump air from the inlet to the -outlet, a stem slidably supported longitudinally s,14s,sao

andfluid outlet, a diaphragm in said fluid chamber, and said stem being connected with said stem,'fluld is drawn into the fluid chamber and then the resilient means exerts a pressure on the fluid to force it out of the fluid outlet, said air cylinder comprising a tube mounted within an outer tube, said fluid chamber comprising another tube mounted within the outer tube, and cap members mounted on the outer ends of the outer tube for forming the head ends of said cylinders, a di'sc being clamped in between the inner ends of said inner tubes, resilient means acting against said disc and directly. and indirectly against said piston !or floating the piston, an auxiliary disc supported by said inner and outertubes, and resilient means acting between said auidliary disc and a member mounted on said stem for resiliently urging said stem in a direction to cause said diaphragm to exert a pressure upon fluid in said fluid chamber.

10. In an alternating or varying pressure or vacuum actuated pump, an air. pump, an air cylinder having an air inlet and an air outlet,

one way valves controlling said inlet and outlet,-

a piston in said cylinder, means for oscillating said piston to pump air from the inlet to the outlet, a stem slidably supported longitudinally on said piston and having a head engaging in a hollow in the piston arranged so that the piston moves the stem in one'direction only, resilient means urging the stem in the other direction,- a

fluid to force it out ofithe' fluid outlet, said air cylinder comprising a tube mounted within an outer tube, said fluid chamber comprising another tube mounted within the outer tube, and cap members mounted on the outer ends of the outer tube for forming the head ends of said cylinders, a disc being clamped in between the inner ends of said inner tubes, resilient means acting against said disc and directly and indirectly against said piston for floating the piston, an auxiliary disc supported by said inner and outer tubes, and resilient means acting between said auxiliary disc and a member inounted on said stem for resiliently urging said stem in a direction to cause said diaphragm to exert a pressure upon fluid in said fluid chamber, said member comprising a flanged'disc, and said resilient means comprising a 'spring resting against said flanged disc.

LOUIS NIKA, Jr.

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